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Last active June 24, 2018 13:30
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Cancel Ubuntu Grub2 menu after failed boot/shutdown.
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README.md

Cancel Ubuntu Grub2 menu after failed boot/shutdown

Use the following values in /etc/default/grub:

GRUB_HIDDEN_TIMEOUT=2
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=0
GRUB_RECORDFAIL_TIMEOUT=2

Then run: sudo update-grub to commit settings.

Notes

  • GRUB_HIDDEN_TIMEOUT will wait X number of seconds for a key to be pressed before displaying the menu. After which menu will be shown for GRUB_TIMEOUT seconds.
  • Using GRUB_HIDDEN_TIMEOUT_QUIET to avoid the on-screen count down of the Grub menu.
  • Setting GRUB_TIMEOUT to zero means to see the Grub menu with GRUB_HIDDEN_TIMEOUT - simply hold down Shift (or similar key) on bootup to access the Grub menu.
  • GRUB_RECORDFAIL_TIMEOUT ensures the Grub menu will display on countdown, rather than the default of "wait for a keypress" after failed boot/shutdown. Handy for headless/keyboard-less systems.
  • Note: Recent versions of Ubuntu/Grub will emit a Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported. by default when rebuilding Grub config. The settings above will avoid this issue.

Reference

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